A couple of things come to mind.
When I was a kid, about 11 or 12, I made a cake using a mix. I couldn't figure out why they two cake rounds were flat as pancakes. My DD and I went over all of the ingredients and it turned out that I left out the eggs. The cakes were so hard, I could have used them as frisbees.
I also found out, like a previouse poster, that if you leave cooking oil in the frying pan on heat that is too high it will ignite. I couldn't believe how the pan went up in flames. In a matter of seconds, the whole house was a big smoke ball.
Another story that my MIL and I were just talking about a couple of weeks ago happened to her at least 10 years ago. She is an excellent Italian cook (from Italy). She makes the most delicious three color cookies. After she baked the three individual cakes, she placed the pans of the tile floor to cool since all of her counter space was taken up. Wouldn't you know it, my SIL came into the kitchen without looking where she was walking and stepped right into the red cake layer. We all looked at each other, at first in shock, and then we started laughing hysterically. Eventually my MIL used the red layer anyway. After the cookies were assembled, nobody was the wiser and they were still delicious!